Dental Dentures: Partial | Cosmetic Dentistry
Dental Dentures
Teeth whitening
5.3 Retention
Fig. 38
The retentive elements should work to oppose all lifting forces and hold the prosthesis in place.
Lifting forces can originate in two ways:
- directly, via sticky foods and
- indirectly, via vertical forces acting on a free-end saddle on the opposite side of a rotating axis (Fig. 38).
The retention of telescoping dentures and precision attachments is generated by friction.
The retention of a clasp arm is a measure of its flexibility. The flexion required to displace the retentive arm of the clasp from its gingival position up to the height of contour provides retention
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